Fault tolerant electric drive system

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(11)

EP 2 617 998 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	07.02.2018 Bulletin 2018/06

(43)	Date of publication A2:
	24.07.2013 Bulletin 2013/30

(21)	Application number: 13150510.9

(22)	Date of filing: 08.01.2013

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International Patent Classification (IPC):

F04B 49/10^(2006.01)
H02P 25/22^(2006.01)
F02D 41/30^(2006.01)

H02P 9/00^(2006.01)
F04B 17/03^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

18.01.2012 GB 201200803

(71)	Applicant: Rolls-Royce PLC
	London SW1E 6AT (GB)

(72)	Inventor:
	Smout, Peter Solihull West Midlands B90 2PU (GB)

(74)	Representative: Gill, Stephen Charles et al
	Mewburn Ellis LLP City Tower 40 Basinghall Street London EC2V 5DE City Tower 40 Basinghall Street London EC2V 5DE (GB)

(54)	Fault tolerant electric drive system

(57) A fault tolerant electric drive system comprises an alternator (10), a motor controller (12) and an electric motor (14), wherein the alternator (10) and motor (14) each have a plurality of corresponding independent phase windings, the motor controller (12) having a plurality of independent phase drives (16) corresponding to the phase windings, and a plurality of independent electric drive phases is defined by connecting each corresponding phase winding of the alternator (10) and motor (14) to a corresponding phase drive (16) of the motor controller (12).

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